Alert archive / Arizona / Flash Flood Warnings in 2022

Flash Flood Warning 171, NWS Phoenix, AZ

August 17, 2022Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 17, 2022, 6:14 PM MST for Maricopa County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 17, 2022, 6:14 PM MST (01:14 UTC)
Expired: Aug 17, 2022, 9:35 PM MST
In force: 3 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 77 km from the middle of the area, began a volume at 01:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Phoenix, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 17, 5:00 PM MST, 1 hour 14 minutes earlier.

Area forecast discussion, Aug 17, 5:00 PM MST, 1 hour 14 minutes before

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In the hours before

Special weather statement, Aug 17, 3:51 PM MST, 2 hours 23 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
351 PM MST Wed Aug 17 2022

AZZ532-535-536-172330-
Gila River Valley AZ-Southeast Yuma County AZ-Yuma AZ-
351 PM MST Wed Aug 17 2022

...A strong thunderstorm will impact portions of west central Yuma
County through 430 PM MST...

At 351 PM MST, Doppler radar was tracking a strong thunderstorm 7
miles south of Ligurta, or 8 miles southeast of Fortuna Foothills,
moving northwest at 15 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Yuma, Fortuna Foothills, Blaisdell, Ligurta, Araby and Kinter.

This includes the following highways...
AZ Interstate 8 between mile markers 5 and 26.
AZ Route 95 between mile markers 29 and 41.
AZ Route 195 between mile markers 25 and 26.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3254 11417 3247 11437 3270 11458 3283 11430
TIME...MOT...LOC 2251Z 151DEG 11KT 3257 11431

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Special weather statement, Aug 17, 4:06 PM MST, 2 hours 8 minutes before

Special Weather Statement
National Weather Service Phoenix AZ
406 PM MST Wed Aug 17 2022

AZZ538-172345-
Tonopah Desert AZ-
406 PM MST Wed Aug 17 2022

...A strong thunderstorm will impact portions of Maricopa County
through 445 PM MST...

At 406 PM MST, Doppler radar was tracking a strong thunderstorm over
Wintersburg, or near Tonopah, moving southwest at 5 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Palo Verde Nuclear Generation Station and Wintersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3348 11290 3340 11276 3321 11288 3343 11312
TIME...MOT...LOC 2306Z 047DEG 6KT 3341 11288

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Local storm report, Aug 17, 4:19 PM MST, 1 hour 55 minutes before

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Special weather statement, Aug 17, 4:41 PM MST, 1 hour 33 minutes before

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Special weather statement, Aug 17, 5:33 PM MST, 41 minutes before

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Special weather statement, Aug 17, 5:42 PM MST, 32 minutes before

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The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 5:03 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	57 min
Aug 17, 5:05 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	40 min
Aug 17, 5:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	45 min
Aug 17, 5:16 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	29 min
Aug 17, 5:33 PM MST	Special Weather Statement	PSR		42 min
Aug 17, 5:42 PM MST	Special Weather Statement	PSR	Pinal	48 min
Aug 17, 5:52 PM MST	Severe Thunderstorm Warning	PSR	Yuma	23 min
Aug 17, 6:01 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	19 min
Aug 17, 6:02 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	21 min
Aug 17, 6:06 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	24 min
Aug 17, 6:12 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	48 min
Aug 17, 6:15 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Yuma	45 min
Aug 17, 6:25 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Aug 17, 6:29 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	61 min
Aug 17, 6:58 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Yuma	32 min
Aug 17, 7:04 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	41 min
Aug 17, 7:12 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa, Yuma	4 hr
Aug 17, 7:21 PM MST	Special Weather Statement	PSR	Yuma	39 min
Aug 17, 7:28 PM MST	Dust Storm Advisory	PSR	Maricopa, Pinal	62 min
Aug 17, 7:44 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	46 min
Aug 17, 8:21 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz, Yuma	4 hr
Aug 17, 8:22 PM MST	Special Weather Statement	PSR	Yuma	38 min
Aug 17, 9:31 PM MST	Special Weather Statement	PSR	Pinal	44 min
Aug 17, 6:57 PM MST	Severe Thunderstorm Warning	PSR	Riverside	20 min

Nearby

Flash Flood Warnings in Arizona, 2022 Every flash flood warning in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.